https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97275
Bug ID: 97275
Summary: Linux kernel cgroup.c internal compiler error (ICE).
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: dr.duncan.p.simpson at gmail dot com
Target Milestone: ---
Host: amd64-linux-gnu
Target: aarch64-linux-gnu
Build: 11.0.0 20201002
Created attachment 49303
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49303&action=edit
cgroup.c reduced to compiler ICE generator
The attached file is a reduced version, which tickles the bug for me. Note that
not using -fno-strict-overflow or most other minor changes eliminate the ICE.
In the original version of cgroup.c many of the things which are compile time
constants in my version are values the compiler might not be able to reason
about.
dps@dps-laptop:~/src/kernel/foo$ aarch64-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/aarch64-linux-gnu/11.0.0/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../gcc/configure --enable-shared --enable-lto
--enable-languages=all --target=aarch64-linux-gnu
--program-prefix=aarch64-linux-gnu- --with-sysroot=/ --enable-host-shared
--enable-host-lto --with-as=/usr/aarch64-linux-gnu/bin/as
--with-ld=/usr/aarch64-linux-gnu/bin/ld --with-ar=/usr/aarch64-linux-gnu/bin/ar
--with-ranlib=/usr/aarch64-linux-gnu/bin/ranlib : (reconfigured)
../gcc/configure --enable-shared --enable-lto --enable-languages=all
--target=aarch64-linux-gnu --program-prefix=aarch64-linux-gnu- --with-sysroot=/
--enable-host-shared --enable-host-lto --with-as=/usr/aarch64-linux-gnu/bin/as
--with-ld=/usr/aarch64-linux-gnu/bin/ld --with-ar=/usr/aarch64-linux-gnu/bin/ar
--with-ranlib=/usr/aarch64-linux-gnu/bin/ranlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20201002 (experimental) (GCC)
